On screen
Cast
10 credited performers
Artwork unavailable
Joel Breed
Professor Jackson
Artwork unavailable
Greta Kernkamp
Elizabeth
Artwork unavailable
Kelan Smith
George
Artwork unavailable
Christopher Sturz
Jonathan
Artwork unavailable
Mike Cook
Gustav/Gruff/Spooky Tree
Artwork unavailable
Mandy Tietz
Stephanie Yates
Artwork unavailable
Cassie Pearson
Penny
Artwork unavailable
Hannah Monterey Jones
Amy
Artwork unavailable
Seth Berrier
Michael Kaiser/Lobo/The Monster
Artwork unavailable
Greg Kernkamp
Sven/Toady/Spooky Tree